Like said, this process is used ON the A/C during an upgrade/maintenace op. The process happens on the ground, the ingredient is not used by the A/C itself. The A/C is pretty much state of the art, this has a connection with Pennsylvania.
The most visibly prominent contributer to the A/C passed away several years ago.
There was a notable story re. this A/C a few years ago that involved an "opposing" state.